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Thank you for your response. I need to fly into Toronto. I know in Toronto airport they have eGates there which US passport holders can use. Any idea if the questions in the kiosk can detect past Canadian PR status even if that was granted when I was citizen of a different country? So my US citizenship/passport was never linked to my Canadian PR. The PR card expired back in 2018.
I suspect that CBSA does in fact connect your U.S. passport to your Canadian PR.

If the airline finds out that you are a PR of Canada, they could ask to see your PR Card before boarding, even though, as mentioned, most U.S. citizens are not asked.
 
If not, you probably should have lost your PR status...especially when you state that in 2018 you told the CBSA officer that "I also said I had no intention to maintain my Canada PR"
 
I am in a similar situation. Did you fly to Vancouver or travelled by road? I have a US passport. Will there be an issue if I fly up there to attend a business conference for 5 days and come back?

I travelled by road. I do enjoy visiting Canada. As far as issues, I wouldn't think you'd have issues entering Canada. Whether or not you lose your PR is uncertain.